Route profile
PHL→MKE
Flight reliability, delays and best times to fly from Philadelphia to Milwaukee. · 690 miles
Right now
Current conditions at both ends of this route.
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Airport conditions describe the airfield, not any individual flight. An airport operating normally is not a guarantee that a specific flight will depart on time.
Route reliability
July 2023 – June 2026
Better than 27% of comparable major US routes (4,577 compared)
Calculated from 1,257 flights. How this is calculated
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – June 2026
Best time to fly
On-time arrival rate by scheduled local departure time.
PHL → MKE flights departing 5–9 AM arrived on time 91.7% of the time, against 69.5% for 6–9 PM departures — a gap of 22.3 percentage points.
By departure window
By departure hour
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Buckets with fewer than 120 flights are not scored.
Airlines on this route
Performance by the carrier that actually operated the flight.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| PSA Airlines | 755 | 78.8% | 2.78% | -11 min | 10.4% |
| Republic Airways | 345 | 80.8% | 2.90% | -10 min | 6.0% |
Carriers on this route performed within a couple of percentage points of each other.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Carriers with fewer than 200 flights on this route are not listed.
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Friday the least, a gap of 5.0 percentage points.
Historical trend
On-time arrival rate by month.
Over the most recent 12 months (2025-01 to 2026-06), on-time arrivals averaged 78.3% against 79.5% in the 12 months before — broadly unchanged.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026
Data and methodology
All figures on this page are calculated by FlyerIntel from 1,257 PHL → MKE flight records published by the US DOT Bureau of Transportation Statistics, covering July 2023 – June 2026. A flight is counted as delayed when it arrives 15 or more minutes after its scheduled arrival time, following BTS methodology. Cancelled and diverted flights have no arrival time and are excluded from on-time rates rather than counted as late.